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Cura generating unnecessary build-plate support

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Posted (edited) · Cura generating unnecessary build-plate support

I'm really struggling with an enclosure with holes in the vertical walls, where the 3mm screw holes are having external supports down to the build plate added, but the bigger 24mm holes are not.



The external support doesn't even connect with the support inside the hole - it's also filling some of the left of the big holes, which are otherwise perfect.

If I try to remove the support with support blocker I can only do it by including the hole - and all the support disappears (including the spurious support inside the big hole).


All print settings are default, and I'm using single extruder. The support setting is left at everywhere because if I select touching buildplate I lose all "internal" supports (support blocker not set):




Increasing the support overhang angle from 60 to 64 degrees removes some of the spurious support in the big hole, but the rest doesn't change.

Unfortunately, I've lost track of which settings I've changed in trying to resolve this, but nothing has removed these external supports which make the printed model unusable. 

Any thoughts would be appreciated!




Edited by emtee
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    Posted (edited) · Cura generating unnecessary build-plate support
    39 minutes ago, fvrmr said:

    Hi @emtee to remove these towers, just disable the option use towers

    Well I'll be darned .... for some reason I didn't even think of these as towers <DOH!!>. Turning them off, certainly works.

    Thanks!! I should have asked the question 20 hours-of-trying ago.

    Edited by emtee
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    Posted · Cura generating unnecessary build-plate support
    On 2/16/2021 at 2:57 PM, fvrmr said:

    Haha 😉


    Nice to hear that it works! 

    Not sure why it does this in the first place, especially as it spills into the big hole - however, it turns out that the support inside the holes wasn't actually anywhere near the top of the holes, so wasn't doing anything and the holes print fine with selective removal of support.

    Thanks again for the help.

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